CVE-2021-27435: Arm Mbed

Critical severity, CVSS 9.8. EPSS: 1.9% chance of exploitation in the next 30 days.

ARM mbed product Version 6.3.0 is vulnerable to integer wrap-around in malloc_wrapper function, which can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

Affected products

• Arm Mbed: version 6.3.0 only

Published 2022-05-03. Last modified 2026-06-17.